Change image size with text based on device dimenssions

[Hallonolle]

Ok so here is the deal: I did a image with text on it in photoshop. The thing is that it looks good on some phone but in some other the text gets blurry. How do I fix this? 

[KetanKumar]

@Hallonolle 

Sorry you are facing this issue, it would be my pleasure to help you.

Welcome to the Shopify community!😊
Thanks for your good question.

Please share your site URL,
I will check out the issue and provide you a solution here.

[Hallonolle]

Sorry, I used wrong image format but I am still having one issue. The image does not show as good contrasts on the site as in windows explorer. Se difference in the attached image here.